WhiteBooks GST API Reference (OpenAPI 3.0)

The WhiteBooks GST API is a GSP-certified REST API for GST return filing, GSTR-2B reconciliation, GSTIN verification, and HSN / SAC code lookup. Authentication is OAuth 2.0 (client_credentials grant). All endpoints return JSON over TLS 1.2+.

Base endpoints

Production: https://api.whitebooks.in/gst
Sandbox: https://apisandbox.whitebooks.in/gst

Primary operations

POST /api/v1/gstr1/file — File GSTR-1 return
POST /api/v1/gstr3b/file — File GSTR-3B return
POST /api/v1/gstr9/file — File GSTR-9 annual return
POST /api/v1/gstr2b/fetch — Fetch GSTR-2B (ITC statement)
GET /api/v1/gstin/{gstin} — Verify GSTIN, return legal name / status
GET /api/v1/hsn-sac/search?q=... — Search HSN / SAC codes

Quick links

Raw OpenAPI 3.0 spec (JSON) — import into Postman / Insomnia / Swagger UI
Landing page with pricing, FAQ, and code samples
Pricing tiers (Starter INR 5,999 → Enterprise INR 24,999+)
Changelog — versioned release notes
Status — 99.994% 30-day uptime
Glossary — GSP, IRP, IRN, GSTR-2B, HSN, SAC, etc.

Schedule Demo

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WhiteBooks GST API Reference (OpenAPI 3.0)

Base endpoints

Primary operations

Quick links

Our Products

Connectors

Tools

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Structured data (Schema.org JSON-LD)